WinMend Folder Hidden is an interesting security utility that can safely hide any file or folder on a Windows partition or removable device, which covers most users' hard drives and external drives as well as flash drives, memory cards and sticks, micro devices, and anything else you can store a file on. Your files and folders stay safe and hidden even if they're reinstalled on another computer, and they can't be seen or accessed by other programs and operating systems. You can enable password protection for specific files and folders or whole volumes of data. WinMend claims that "safety first" was a guiding principle in developing Folder Hidden and promises it will never damage the files and folders it secures.
The program's interface is fairly basic, just a tabbed window with directory-style list and a few simple commands, but there are some customization options, such as the ability to change the layout's colors. One of the advantages WinMend claims for Folder Hidden is its ability to quickly hide virtually any size folder or file, up to dozens of gigabytes. It certainly performs its duty quickly and effectively, hiding folders from view and retrieving them when you enter your selected password.
There are lots of reasons to hide data, not the least of which is that it's part of a general PC security regimen that could head off a hassle some day. WinMend Folder Hidden is freeware. It works with 64-bit versions of Windows, including Vista, so Windows 7 shouldn't be a problem.